New observations of Oculicosa supermirabilis Zyuzin 1993 from new localities are presented. Notes on the habitat, map of all collecting localities and live photographs of a specimen and its peculiar burrow are given.
In this short paper, we report the predation of an orb-weaving spider Neoscona sp. (Araneae: Araneidae)
by a corinnid sac spider Corinnomma severum (Araneae: Corinnidae) from Thailand. To the best of our knowledge, this is the first report of predation of web-building spider by a spider of the genus Corinnomma observed in the field.
There are currently doubts about the correct genus of many Japanese species of coelotine spider provisionally classified in the genus Coelotes. Thus, taxonomic revisions were performed on 16 species with two retromarginal teeth on their chelicerae. Consequently, three new genera of the subfamily Coelotinae are described here. Aeolocoelotes gen. n. consists of seven species, which are characterized by extremely diverse variations in their genital organs and by the clear parapatric distributions among the congeneric species. Individuals in Aeolocoelotes gen. n. have large and dark-colored bodies, and females have a stiff chitinous epigyne. Curticoelotes gen. n. consists of six species, which are characterized by a short cymbium in the male palp. Finally, Griseidraconarius gen. n. consists of three species, which are characterized by their pale-colored bodies, spiraled conductors in the male palp, and tiny epigynal teeth.
Distributions of a maritime harvestman, Psathyropus tenuipes and a riparian harvestman Paraumbogrella pumilio were investigated along the Sendai River, Tottori City, Honshu, Japan. Psathyropus tenuipes was found from the mouth of the river to the site 4 km upstream where slight salinity (0.1 PPT) was detected in the river. On the other hand, no specimens were found from the upstream sites where no salinity was detected.This indicates that the species needs at least a slight salinity for its occurrence. Paraumbogrella pumilio was found at five sites from the dry riverbed near the Shobu floodgate to a site on the right bank of Sendai River just upstream of Yachiyo Bridge. Occurrence of this species seems to be related to presence of open ground covered with lower grasses on the banks. Recently, the both species were also found from the right bank of the river mouth of Sendai River that is also a part of Tottori Sand Dunes. These are the first records of harvestmen from Tottori Sand Dunes.
Aetius bicuspidatus sp. nov. (Araneae: Corinnidae) is described here on the basis of male and female specimens collected from the Lambir Hills National Park, Sarawak, Borneo. The posterior carapace is elongated with bicuspid edge in both male and female. This character condition is very unique among Aetius species.
A population of Pseudogagrella amamiana (Nakatsudi 1942) (Arachnida: Opiliones: Sclerosomatidae) was found from a town park in the suburbs of Yokohama City, Kanagawa Prefecture, Honshu, Japan, in 2017. Furthermore, another population of the species was found from Unomisaki Point, Ishihama Beach, Hitachi City, Ibaraki Prefecture, in 2019. This species has been known from the Ryukyu Islands (in and north of Kumejima Island), and sporadically from Kyushu and westernmost part of Honshu (Yamaguchi Prefecture). It is highly probable that these populations in Yokohama and Unomisaki Point have originated from a few males and females or a gravid female or soil litter containing eggs somehow introduced from the native ranges of the species, because the present localities are more than 700 km apart from the nearest known locality of the species in Yamaguchi Prefecture. The chromosome number of these populations showed 2n = 18, hence it seems that the population came from the native ranges of the species other than Okinawa and Kumejima Islands where it is 2n = 20.
We report the first record of the wolf spider Draposa lyrivulva (Bösenberg & Strand 1906) outside its known distribution in Pakistan, India and the island of Sri Lanka on the remote tropical islands of the Maldives. It is the first species report of any Lycosidae from these islands. As this remote archipelago in the Indian Ocean lies about 500 km off the Indian subcontinent and comprises more than 1100 islands, the finding of D. lyrivulva as a common species there suggests that this spider could have colonized the islands either via aerial dispersal, rafting or has been introduced by humans.
Three new species of spiders are described from southern Iran: Filistata balouchi sp. n. (♂, Filistatidae; Sistan & Baluchistan Province), Levymanus dezfulensis sp. n. (♀, Palpimanidae; Khuzestan Province) and Scytodes kumonga sp. n. (♀, Scytodidae; Hormozgan Province). This is the first record of the genus Levymanus in Iran, and the easternmost record of the genus Filistata globally.
A new jumping spider species, Chinattus prabodhi sp. nov. is described based on female specimens collected from Assam State of India. Females of the new species can be distinguished from other known congeners by the epigyne lacking a distinctive circular median pocket, the long, narrow and arching copulatory ducts, aligned posteriorly at the copulatory openings, and the oblong spermathecae. With the discovery of the new species, the genus Chinattus Logunov 1999 is reported for the first time from India.
A small orb-web spider species, Gea subarmata Thorell 1890, was newly recorded from Japan. The previously known distribution of G. subarmata ranged from India to New Guinea, and its closest known habitat to Japan was in the Philippines. The specimen was collected at a resort hotel, and no other specimen could be found; therefore, it seemed that the species is not native, but rather introduced. The genus Gea was also newly recorded from Japan.
Japanese spiders of the genus Theridiosoma (Araneae: Theridiosomatidae) were revised with redescription of T. epeiroides Bösenberg & Strand 1906 and description of four new species, namely: T. dissimulatum sp. nov., T. paludicolum sp. nov., T. fulvum sp. nov., and T. alboannulatum sp. nov. The internal morphology of the female genitalia of T. epeiroides is illustrated in this study for the first time. Males of the new species can be distinguished from their congeners by the morphology of the embolic apophyses or the posterior edge of the embolic division on the male palp. Females of the former three species can be differentiated from their related species by the shape of the contour formed by interior edges of a pair of sclerotized processes on the posterior edge of the genital plate. The latter species can be distinguished from the allied species
by the angular lateral corners of the genital plate and overall shape of the genitalia (longer than wide).